CN106211496A - Generate the voltage feedback signal in non-isolated LED driver - Google Patents
Generate the voltage feedback signal in non-isolated LED driver Download PDFInfo
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- CN106211496A CN106211496A CN201510345564.3A CN201510345564A CN106211496A CN 106211496 A CN106211496 A CN 106211496A CN 201510345564 A CN201510345564 A CN 201510345564A CN 106211496 A CN106211496 A CN 106211496A
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- electric current
- amperometric
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
A kind of LED, it includes one or more LED, is coupled to input voltage source and one or the inductive element of more LED and is coupled to the switch of this inductive element.First amperometric is coupled between input voltage source and the ground nodes of LED so that the electric current detected by the first amperometric is proportional to the bulk voltage across input voltage source.Second amperometric is coupled between inductive element and ground nodes so that the electric current detected by the second amperometric is proportional to the drain voltage across switch.Switch controller controls switch based on instruction across the feedback signal of the voltage of inductive element, and the difference between the electric current that this feedback signal detects based on the electric current detected by the second amperometric and the first amperometric generates.
Description
Technical field
Present disclosure relates to driving LED (light emitting diode) lamp, and relates more specifically to raw
Become instruction across the feedback signal of the voltage of the inducer of LED.
Background technology
In such as architectural lighting, automobiles and taillight, for the backlight of liquid crystal indicator and flash of light
The most multiple electronic application of lamp is using LED.With conventional illumination sources such as electric filament lamp and
Fluorescent lamp is compared, and LED has significant advantage, including high efficiency, good directivity, color
Stability, high reliability, long-life, small size and Environmental security.
It is better than white heat owing to LED provides in terms of power efficiency (lumen per watt) and spectral quality
The significant advantage of lamp (bulb), so the use that LED is in illumination applications is expected to be expanded.This
Outward, with may due to fluorescent lamp refuse process and cause the fluorescent lamp lighting system of mercury pollution (with glimmering
The flourescent ballast that light modulation combines) to compare, LED shows lower environmental effect.
But, do not revising in current wiring and the situation of parts facility of incandescent lamp bulb surrounding structure
Under, traditional LED lamp can not directly replace electric filament lamp and tunable optical fluorescing system.This is because it is traditional
Electric filament lamp is voltage driver, and LED is current driving device, it is therefore desirable to different technology
Control the intensity of its respective light output.
The phase angle of the AC input electric power that many dimmer switch put on electric filament lamp by control is come
Adjust the RMS-voltage value of lamp input voltage, so that electric filament lamp to be dimmed.Controlling phase angle is to use
With adjust supply incandescent lamp bulb RMS-voltage and provide dimming capability effectively and the most square
Method.But, due to LED be current driving device and therefore LED be current driving device,
So the Conventional dimmers switch controlling the phase angle of input voltage is incompatible with traditional LED lamp.
A kind of scheme solving this compatibility issue uses following LED driver, and this LED drives
Device sensing lamp input voltage is to determine the work duty cycle of dimmer switch, and at dimmer switch
Work duty cycle reduce by the forward current being adjusted of LED when reducing.In some feelings
Under condition, LED driver to across transformator LED deliver electric power, by the output of LED with
Input isolation.In order to regulate the electric current by LED, LED driver receive about output voltage or
Feedback by the electric current of LED.Many LED drivers use the auxiliary of the primary side of transformators around
Group senses output.But, add LED driver via auxiliary winding sensing output voltage
Complexity, makes both the cost of LED driver and size increase.
Summary of the invention
In order to reduce cost and the complexity of LED, in the feelings not relying on auxiliary transformer winding
The instruction feedback signal across the voltage of the output of inducer is generated under condition.According to various embodiments
LED include one or more LED and be coupled to input voltage source and one or more
The inductive element (such as, inducer or the armature winding of transformator) of LED.Switch is coupled to electricity
Inductive element so that generate electric current in response to switch connection in the inductor and break in response to switch
Open and generate electric current the most in the inductor.First amperometric is coupled in input voltage source and LED
Between the ground nodes of lamp, and the second amperometric be coupled in inductive element and ground nodes it
Between.The electric current detected by the first amperometric is proportional to the bulk voltage across input voltage source, and
The electric current detected by the second amperometric is proportional to the drain voltage across switch.
In one embodiment, comparator determine the electric current that detected by the second amperometric with by
Difference between the electric current that first amperometric detects.(such as, this difference between current is converted into voltage
Resistance based on the first amperometric and the resistance of the second amperometric), and input to switch
Controller is as the feedback signal of the voltage indicated across inductive element.When the electric current in inductive element
When being not zero, this voltage is equal to the voltage across LED.When electric current is zero, this voltage can be due to electricity
Inductance and the electric capacity of inductive element and vibrate, this may be used for paddy mode detection and drives to improve LED
The efficiency of device.Switch controller controls the switching of switch based on feedback signal, with regulation by one
Or the output electric current of more LED.
The feature and advantage described in the description are not exhaustively, and specifically, use for reference attached
Figure, specification and claims, many other feature and advantage are for ordinary skill people
Will be apparent from for Yuan.Further, it is to be noted that language used in the specification is mainly
Select for readability and the purpose of guidance, rather than be selected to describe or limit the master of the present invention
Topic.
Accompanying drawing explanation
Described in detail below by being considered in conjunction with the accompanying, it can be readily appreciated that the embodiment party of the present invention
The teaching of formula.
Fig. 1 shows the LED lamp circuit according to an embodiment.
Fig. 2 A to Fig. 2 B is the block diagram of the parts illustrating the LED according to an embodiment.
Fig. 3 shows the example waveform of the bulk voltage according to an embodiment and drain voltage.
Fig. 4 shows and shows bulk voltage, body electric current, drain voltage and leakage according to an embodiment
The example waveform of the relation between electrode current.
Detailed description of the invention
The accompanying drawings and the description below only relate to the preferred embodiment of the present invention by the way of explanation.Should
It is noted that according to following discussion, will readily appreciate that the alternative of the structures disclosed herein and method
Embodiment, can as can use in the case of without departing substantially from the principle of claimed invention
Row alternative.
Now by detail with reference to some embodiments of the present invention of its example shown in the drawings.Want
It is noted that in the case of any practice, similar or identical accompanying drawing can be used in the accompanying drawings
Labelling, and it can represent similar or identical function.Accompanying drawing is for illustration purposes only and depicts
Embodiments of the present invention.Those skilled in the art will readily appreciate that according to following description, is not carrying on the back
Structures and methods shown in this article can be used in the case of the principle of invention as described herein
Alternative embodiment.
As being described in more detail below with reference to accompanying drawings, utilize voltage feedback signal to provide and be adjusted
The Switching Power Supply of output voltage need not assist winding.Such as, according to the LED of various embodiments
Lamp system and method generate in the case of not using auxiliary transformer winding instruction be coupled to one or
The feedback signal of the output voltage being adjusted of more LED matrix.Owing to auxiliary winding adds
Cost and complexity, thus do not rely on auxiliary winding and generate feedback signal and reduce LED system
The cost of system and complexity.
Fig. 1 shows and includes switching 120 LED 130 being used together with Conventional dimmers
LED lamp system.LED 130 according to various embodiments is during Conventional dimmers switch sets
Electric filament lamp directly substitute.Dimmer switch 120 and ac input voltage source 110 and LED
130 in series place.Dimmer switch 120 receives dimming input signal 125, and uses this defeated
Enter signal 125 to set the expectation light output intensity of LED 130.Dimmer switch 120 receives
Ac input voltage signal 115, and adjust lamp input voltage in response to dimming input signal 125
The V-RMS value of 135.In other words, the lamp input voltage of LED 130 is put on by regulation
The RMS value of 135 realizes the control of the dimmer switch 120 light intensity to being exported by LED 130
System.LED 130 controls the light output intensity of LED 130, to become with lamp input voltage 135
Ratio ground changes, although LED is current driving device rather than voltage driver, but also presents
Go out the behavior similar with electric filament lamp.Dimming input signal 125 can be manually (via in this article
Unshowned knob or slider switch) provide or via automatization's Lighting Control Assembly (in this article
Not shown) provide.
It is defeated that dimmer switch 120 adjusts lamp by the phase angle of control ac input voltage signal 115
Enter the V-RMS of voltage 135.Especially, dimmer switch 120 is by eliminating AC input signal
The part of each half period of 115 reduces the V-RMS of input voltage 135.Usually, adjust
Light device switch 120 is by increasing the part being eliminated of each half period and thus reducing dimmer
Increase dimming effect (that is, reducing light intensity) turn-on time.
Fig. 2 A to Fig. 2 B is the block diagram of the parts illustrating LED 130.In one embodiment,
LED 130 includes bridge rectifier D B1, input capacitor C1, inductive element L1, defeated
Go out capacitor C2, switch S1 and switch controller U1.Other embodiments of LED 130 can
To include different or other parts.
Bridge rectifier D B1 inputs the voltage letter to LED 130 to by dimmer switch 120
Numbers 135 carry out rectification, and provide the rectified voltage across input capacitor C1.Inductive unit
Part L1, diode D1, capacitor C2 and switch S1 form buck-boost type power converter,
This buck-boost type power converter provides output to one or more LED as shown in Figure 2
The electric current being adjusted of LED1.Controller U1 control switch S1 switch on and off the cycle, with to
LED1 provides the output electric current being adjusted.When switching S1 and connecting, owing to diode D1 is the most inclined
Put, so input to the electric power of LED 130 is stored in inductive element L1.At switch
During the break period of S1, electric current is provided to the LED1 across capacitor C2.An embodiment party
In formula, as shown in Figure 2 A, inductive element L1 includes the armature winding of transformator.At another
In embodiment, as shown in Figure 2 B, inductive element L1 is inducer.Additionally, LED 130
Other embodiments can have following power converter, this power converter has except blood pressure lowering liter
Topology beyond pressure, such as reverse exciting topological.
Controller U1 controls the switching of switch S1 so that keep the electric current of substantial constant to pass through
LED1.In one embodiment, controller U1 receives the instruction feedback across the output voltage of L1
Voltage V_sense, and control to switch the switching of S1 in response to this feedback.Additionally, at one
In embodiment, controller U1 receives instruction for LED 130 from dimmer switch 120
The dim signal of light modulation amount.In this case, controller U1 controls the electric current by LED1, makes
Must essentially correspond to from the output light intensity of LED1 with the light modulation amount for LED 130.
Controller U1 can use many modulation techniques such as pulse width modulation (PWM) or pulse frequency
Modulation (PFM) controls to switch the on-state of S1 and off-state and duty cycle.PWM
It is following technology with PFM: described technology is for the use generated by controller U1 by control respectively
Switched power changer is controlled defeated to realize in the width driving signal and frequency driving switch S1
Go out electric adjustment.
As shown in Fig. 2 A to Fig. 2 B, LED1 couples across inductive element L1, and therefore
For output (that is, the most referenced to ground) of floating.Additionally, go to the rectified of inductive element L1
Voltage input inputs for high voltage, so being difficult to directly measure input voltage.In order to measure across L1's
Output voltage, LED 130 includes two amperometric R1 and R2, such as Fig. 2 A to 2B institute
Showing, in one embodiment, each amperometric includes one or more resistor.First
Amperometric R1 is coupled between the ground nodes of input voltage source and LED 130, and the
Two amperometric R2 are coupled between inductive element L1 and ground nodes.By the first electric current inspection
Survey the electric current I1 that detects of device R1 with across input capacitor C1 bulk voltage V_bulk (that is, by
The voltage inputting the signal to LED 130 of bridge rectifier D B1 rectification) proportional.By
The electric current I2 that two amperometric R2 detect becomes ratio with the drain voltage V_drain across switch S1
Example.
In one embodiment, the sensing electric current I1 (such as by ammeter 202A and 202B)
And I2, and it is input to comparator 204.Comparator 204 generates and represents electric current I2 and electric current
Signal delta I of the difference between I1.Current-to-voltage convertor 206 receives the Δ I generated by comparator 204
Signal, and determine the voltage across LED1 based on Δ I.Such as, if amperometric is
Resistor, then current-to-voltage convertor 206 is based on Δ I and resistor R1 and the electricity of resistor R2
Resistance determines the voltage across LED1.Determined by across LED1 voltage export to controller U1 make
For voltage feedback signal V_sense.In another embodiment, current-to-voltage convertor 206 connects
Receive or detection electric current I1 and I2, described electric current be converted into equivalent voltage V_bulk and V_drain,
And determine the difference between equivalent voltage.In this case, determined by, voltage difference is equivalent to across inductance
Property element L1 voltage Vo, and determined by voltage difference output to controller U1 as feedback letter
Number V_sense.In yet, controller U1 be configured to receive represent electric current I2 with
The signal of the difference between I1, determines the voltage Vo across L1 based on this difference between current, and in response to
Determined by voltage control the output being adjusted by LED1.
Fig. 3 shows bulk voltage V_bulk measured by current-to-voltage convertor 206 and drain electrode electricity
The example waveform of pressure V_drain.Shown in Fig. 3 is the cycle of AC input signal V_in
A part and switch the switching of S1 during this cycle, the measured value of V_bulk and V_drain,
And the Δ V signal generated by deducting V_bulk from V_drain.As it is shown on figure 3, by
The V_bulk that current-to-voltage convertor 206 is measured is affected by the amplitude of ac input voltage, is opening
Close increase proportional to the increase of the amplitude of ac input voltage during the break period of S1.V_drain
Affected by the amplitude of ac input voltage similarly, and also during the break period of switch S1
Present the high frequency voltage vibration caused due to the resonance of inductive element L1 and output capacitor C2.
By deducting V_bulk from V_drain, current-to-voltage convertor 206 removes owing to AC inputs
Voltage and low-frequency voltage in the V_drain that causes changes, and generate signal delta V.
Fig. 4 shows display body voltage V_bulk and the electricity detected by the first amperometric R1
Relation between stream and drain voltage V_drain and the electricity detected by the second amperometric R2
The example waveform of the relation between stream.As shown in Figure 4, the first amperometric R1 detect
Electric current I1 to V_bulk is proportional, and the electric current I2 detected by the second amperometric R2
Proportional to V_drain.Therefore, by deducting from the electric current detected by the second amperometric
The electric current that detected by the first amperometric and signal delta I that generates with represent drain voltage and body electricity
Signal delta V (V_out) of the difference between pressure is proportional.Therefore, by measuring difference between current Δ I, electricity
Stream electric pressure converter measures the voltage across LED1 indirectly.
Situation when the above-mentioned example providing voltage feedback signal at use V_bulk and V_drain
Time lower, the bigger difference of the amplitude of the voltage of two nodes increases obtained voltage feedback signal by tending to
Inaccuracy.Such as, at the buck-boost converter that turn ratio is 1 of inductive element L1
In the case of:
I1=V_bulk/R1 and I2=V_drain/R2, or V_drain=V_bulk+Vo.
Therefore:
I2=(V_bulk+Vo)/R2
And
Δ I=I2-I1=(V_bulk+Vo)/R2 V_bulk/R1.
If R1=R2, then above formula is reduced to Vo/R1, but when R2 is not equal to R1, then Δ I is
Δ I=V_bulk/R2 V_bulk/R1+Vo/R2.
Due to front two unmatched and in view of V_bulk > > Vo, this is present in above-mentioned example,
So it by with V_bulk increase and become serious in the way of make the measurement of output voltage (Vo) deteriorate.
This problem can solve by one of described item is multiplied by normalization factor (k), wherein,
Δ I=I2*k-I1 or Δ I=I2-k*I1.
Controller U1 switch reset the dead band after the period time, i.e. at V_drain=V_bulk
Time can easily calibration variables k.Normalization factor " k " can be adjusted, with calibration by common-mode voltage
The skew introduced.In one embodiment, normalization factor " k " is calibrated to so that difference output
(Voltage Feedback) causes 0V.
The LED lamp of the various embodiments according to present disclosure has the advantage that LED can
Directly to replace the conventional incandescent in the typical case's wiring configuration found in house and commercial lighting are applied
Lamp, and LED can perform the conventional tune of light modulation with the input voltage being gone to lamp by change
Light device switch is used together.Additionally, generate instruction across LED in the case of not relying on auxiliary winding
The feedback signal of voltage, reduce cost and the complexity of LED.
When reading present disclosure, it should be appreciated by those skilled in the art that and still suffer from for LED
Additional alternative design.Therefore, although it is shown that and describe only certain exemplary embodiments of this invention
And application, it is to be understood that, the invention is not restricted to definite structure disclosed herein and parts,
And without departing from the spirit and scope of the present invention, can be in invention disclosed herein
The layout of method and apparatus, operation and details in make will be bright to those skilled in the art
Aobvious various amendments, change and modification.
Claims (19)
1. a LED light lamp, including:
One or more light emitting diode；
It is coupled to input voltage source and one or the inducer of more light emitting diode；
It is coupled to the switch of described inducer, generates in described inducer in response to described switch connection
Electric current, and do not generate the electric current in described inducer in response to described switching off；
It is coupled in first between the ground nodes of described input voltage source and described LED light lamp
Amperometric, described first amperometric detection becomes ratio with the bulk voltage across described input voltage source
The electric current of example；
The second amperometric being coupled between described inducer and described ground nodes, described second
The electric current that amperometric detection is proportional to the drain voltage across described switch；And
Switch controller, described switch controller receives the feedback letter of the output voltage that instruction is adjusted
Number, described feedback signal is based on the electric current detected by described second amperometric and by described first
Difference between the electric current that amperometric detects generates, and described switch controller is suitable to based on described
Feedback signal controls the switching of described switch, with regulation by one or more light-emitting diodes
The output electric current of pipe.
LED light lamp the most according to claim 1, also includes:
Comparator, described comparator receives the electric current detected by described first amperometric and by institute
Stating the electric current that the second amperometric detects, described comparator is suitable to generate by described second electric current inspection
Survey the difference between electric current and the electric current detected by described first amperometric that device detects；And
Current-to-voltage convertor, described current-to-voltage convertor receives by described second from described comparator
Between electric current and the electric current detected by described first amperometric that amperometric detects
Difference, and examined with by described first electric current by the electric current that will be detected by described second amperometric
The difference surveyed between the electric current that device detects is converted into voltage to generate described feedback signal.
LED light lamp the most according to claim 1, wherein, described switch controller is also
Be suitable to:
Receive the electric current detected by described first amperometric and by described second amperometric
The electric current detected；
Based on the electric current detected by described first amperometric with by described second amperometric
The electric current detected is to determine described bulk voltage and described drain voltage；And
The output voltage being adjusted is determined based on the difference between described drain voltage and described bulk voltage.
LED light lamp the most according to claim 1, wherein, described switch controller from
Dimmer switch receives the instruction input signal for the light modulation amount of described LED light lamp, and its
In, described switch controller is suitable to regulate by one or more based on described input signal
The output electric current of light emitting diode so that one or the output light intensity of more light emitting diode
Essentially correspond to the described light modulation amount for described LED light lamp.
LED light lamp the most according to claim 1, wherein, one or more
Light emitting diode couples across described inducer.
LED light lamp the most according to claim 1, wherein, described switch is coupled in institute
State between inducer and the described ground nodes of described LED light lamp.
LED light lamp the most according to claim 1, wherein, described feedback signal also base
In being applied to the electric current that detected by described first amperometric and by described second amperometric
The calibration factor of the one in the electric current detected generates.
8. a LED light lamp, including:
One or more light emitting diode；
Transformator, described transformator includes that armature winding, described armature winding are coupled to input voltage source
With one or more light emitting diode；
Be coupled to the switch of described armature winding, generate in response to described switch connection described primary around
Electric current in group, and the electric current in described armature winding is not generated in response to described switching off；
It is coupled in first between the ground nodes of described input voltage source and described LED light lamp
Amperometric, described first amperometric detection becomes ratio with the bulk voltage across described input voltage source
The electric current of example；
The second amperometric being coupled between described armature winding and described ground nodes, described
The electric current that two amperometric detections are proportional to the drain voltage across described switch；And
Switch controller, described switch controller receives the feedback letter of the output voltage that instruction is adjusted
Number, described feedback signal is based on the electric current detected by described second amperometric and by described first
Difference between the electric current that amperometric detects generates, and described switch controller is suitable to based on described
Feedback signal controls the switching of described switch, with regulation by one or more light-emitting diodes
The output electric current of pipe.
LED light lamp the most according to claim 8, also includes:
Comparator, described comparator receives the electric current detected by described first amperometric and by institute
Stating the electric current that the second amperometric detects, described comparator is suitable to generate by described second electric current inspection
Survey the difference between electric current and the electric current detected by described first amperometric that device detects；And
Current-to-voltage convertor, described current-to-voltage convertor receives by described second from described comparator
Between electric current and the electric current detected by described first amperometric that amperometric detects
Difference, and by by the electric current by described second amperometric detection and by described first current detecting
Difference between the electric current that device detects is converted into voltage to generate described feedback signal.
LED light lamp the most according to claim 8, wherein, described switch controller is also
Be suitable to:
Receive the electric current detected by described first amperometric and by described second amperometric
The electric current detected；
Based on the electric current detected by described first amperometric with by described second amperometric
The electric current detected is to determine described bulk voltage and described drain voltage；And
The output voltage being adjusted is determined based on the difference between described drain voltage and described bulk voltage.
11. LED light lamp according to claim 8, wherein, described switch controller from
Dimmer switch receives the instruction input signal for the light modulation amount of described LED light lamp, and its
In, described switch controller is suitable to regulate by one or more based on described input signal
The output electric current of light emitting diode so that one or the output light intensity of more light emitting diode
Essentially correspond to the described light modulation amount for described LED light lamp.
12. LED light lamp according to claim 8, wherein, one or more
Light emitting diode couples across the armature winding of described transformator.
13. LED light lamp according to claim 8, wherein, described switch is coupled in institute
State between the armature winding of transformator and the ground nodes of described LED light lamp.
14. LED light lamp according to claim 8, wherein, described feedback signal also base
In being applied to the electric current that detected by described first amperometric and by described second amperometric
The calibration factor of the one in the electric current detected generates.
15. 1 kinds of methods for driven for emitting lights diode lights, described LED light lamp includes: one
Individual or more light emitting diodes；It is coupled to input voltage source and one or more light-emitting diodes
The inducer of pipe；It is coupled to the switch of described inducer；Be coupled in described input voltage source with described
The first amperometric between the ground nodes of optical diode lamp；And be coupled in described inducer with
The second amperometric between described ground nodes, wherein, generates in response to described switch connection
Electric current in described inducer, and do not generate in described inducer in response to described switching off
Electric current, described first the amperometric electric current detected and the bulk voltage across described input voltage source
Proportional, described second amperometric the electric current detected becomes with the drain voltage across described switch
Ratio, described method includes:
Receive the electric current detected by described first amperometric and by described second amperometric
The electric current detected；
Based on the electric current detected by described second amperometric and by described first amperometric
Difference between the electric current detected generates the feedback signal of the output voltage that instruction is adjusted；And
The switching of described switch is controlled, with regulation by one or more based on described feedback signal
The output electric current of multiple light emitting diodes.
16. methods according to claim 15, wherein, described LED light lamp also includes
Comparator and current-to-voltage convertor, and wherein, generate described feedback signal and include:
By described comparator generate the electric current that detected by described second amperometric with by described
Difference between the electric current that first amperometric detects；And
By described current-to-voltage convertor by the electric current that detected by described second amperometric with
Difference between the electric current detected by described first amperometric be converted into voltage to generate described instead
Feedback signal.
17. methods according to claim 15, wherein, generate described feedback signal and include:
Based on the electric current detected by described first amperometric with by described second amperometric
The electric current detected is to determine described bulk voltage and described drain voltage；And
The output voltage being adjusted is determined based on the difference between described drain voltage and described bulk voltage.
18. methods according to claim 15, also include:
The instruction input signal for the light modulation amount of described LED light lamp is received from dimmer switch；
And
Regulate by one or the output of more light emitting diode based on described input signal
Electric current so that the output light intensity of one or more light emitting diode with for described luminous two
The described light modulation amount of pole spot essentially corresponds to.
19. methods according to claim 15, wherein, described feedback signal is additionally based upon applying
Detect to the electric current detected by described first amperometric with by described second amperometric
Electric current in the calibration factor of one generate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/486,878 US9380670B2 (en) | 2014-09-15 | 2014-09-15 | Generating a voltage feedback signal in non-isolated LED drivers |
| US14/486,878 | 2014-09-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106211496A true CN106211496A (en) | 2016-12-07 |
| CN106211496B CN106211496B (en) | 2018-12-04 |
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| CN201510345564.3A Active CN106211496B (en) | 2014-09-15 | 2015-06-19 | Method and apparatus for generating the voltage feedback signal in non-isolated LED driver |
| CN201520431664.3U Expired - Fee Related CN204795733U (en) | 2014-09-15 | 2015-06-19 | Light -emitting diode lamp |
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| CN201520431664.3U Expired - Fee Related CN204795733U (en) | 2014-09-15 | 2015-06-19 | Light -emitting diode lamp |
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| US (1) | US9380670B2 (en) |
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| US20120286663A1 (en) * | 2011-05-12 | 2012-11-15 | Osram Sylvania Inc. | Driver circuit for reduced form factor solid state light source lamp |
| CN203086823U (en) * | 2013-02-06 | 2013-07-24 | 杭州士兰微电子股份有限公司 | Non-isolated LED driving circuit without auxiliary winding power supply |
| CN103648222A (en) * | 2013-12-24 | 2014-03-19 | 杭州士兰微电子股份有限公司 | Non-isolated field light-emitting diode (LED) driving circuit with power factor corrector (PFC) and controller thereof |
| CN103687186A (en) * | 2012-09-07 | 2014-03-26 | 英飞凌科技奥地利有限公司 | Circuit and method for driving LEDs |
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| DE19814681B4 (en) | 1998-04-01 | 2008-11-13 | Infineon Technologies Ag | Current Mode Switching Regulators |
| WO2010139080A1 (en) * | 2009-06-05 | 2010-12-09 | Sander Elektronik Ag | Electronic circuit for converting a mains-operated luminaire into an emergency luminaire |
| EP2589267B1 (en) * | 2010-06-04 | 2014-02-26 | Opulent Electronics International PTE Ltd. | Device and method for driving leds |
| WO2014179001A1 (en) * | 2013-05-03 | 2014-11-06 | Marvell World Trade Ltd | Method and apparatus for dimmable led driver |
| CN103327694B (en) * | 2013-06-26 | 2015-07-22 | 上海晶丰明源半导体有限公司 | Silicon controlled dimming LED drive circuit |
-
2014
- 2014-09-15 US US14/486,878 patent/US9380670B2/en active Active
-
2015
- 2015-06-19 CN CN201510345564.3A patent/CN106211496B/en active Active
- 2015-06-19 CN CN201520431664.3U patent/CN204795733U/en not_active Expired - Fee Related
- 2015-08-17 DE DE102015215659.1A patent/DE102015215659B4/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120286663A1 (en) * | 2011-05-12 | 2012-11-15 | Osram Sylvania Inc. | Driver circuit for reduced form factor solid state light source lamp |
| CN103687186A (en) * | 2012-09-07 | 2014-03-26 | 英飞凌科技奥地利有限公司 | Circuit and method for driving LEDs |
| CN203086823U (en) * | 2013-02-06 | 2013-07-24 | 杭州士兰微电子股份有限公司 | Non-isolated LED driving circuit without auxiliary winding power supply |
| CN103648222A (en) * | 2013-12-24 | 2014-03-19 | 杭州士兰微电子股份有限公司 | Non-isolated field light-emitting diode (LED) driving circuit with power factor corrector (PFC) and controller thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US20160081152A1 (en) | 2016-03-17 |
| CN106211496B (en) | 2018-12-04 |
| DE102015215659B4 (en) | 2019-04-04 |
| CN204795733U (en) | 2015-11-18 |
| US9380670B2 (en) | 2016-06-28 |
| DE102015215659A1 (en) | 2016-03-17 |
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